feat(clients): add bulk enable/disable and move selection actions into More menu

Add bulkEnable/bulkDisable named endpoints backed by a shared internal impl, and consolidate the per-selection actions (attach, detach, add to group, ungroup, enable, disable, adjust, sub links) into the clients table's More dropdown so the toolbar only shows the selection count and delete. Translate the new enable/disable confirm dialogs and toasts across all 13 locales.

internal/web/translation/pt-BR.json

@@ -816,6 +816,12 @@
       "attach": "Associar",
       "adjust": "Ajustar",
       "subLinks": "Links de assinatura",
+      "enable": "Ativar",
+      "disable": "Desativar",
+      "bulkEnableConfirmTitle": "Ativar {count} clientes?",
+      "bulkEnableConfirmContent": "Ativa cada cliente selecionado em todos os inbounds associados. Clientes cuja cota se esgotou ou cuja validade expirou serão desativados novamente de forma automática.",
+      "bulkDisableConfirmTitle": "Desativar {count} clientes?",
+      "bulkDisableConfirmContent": "Desativa cada cliente selecionado em todos os inbounds associados. Eles perdem o acesso imediatamente, mas seus registros e tráfego são mantidos.",
       "selectedCount": "{count} selecionado(s)",
       "attachSelected": "Associar ({count})",
       "attachToInboundsTitle": "Associar {count} cliente(s) a entrada(s)",
@@ -872,6 +878,10 @@
         "allTrafficsReset": "Tráfego de todos os clientes redefinido",
         "bulkDeleted": "{count} clientes excluídos",
         "bulkDeletedMixed": "{ok} excluídos, {failed} com falha",
+        "bulkEnabled": "{count} clientes ativados",
+        "bulkEnabledMixed": "{ok} ativados, {failed} com falha",
+        "bulkDisabled": "{count} clientes desativados",
+        "bulkDisabledMixed": "{ok} desativados, {failed} com falha",
         "bulkCreated": "{count} clientes criados",
         "bulkCreatedMixed": "{ok} criados, {failed} com falha",
         "bulkAdjusted": "{count} clientes ajustados",